Wrist based HRM way out compared to my Garmin chest HRM!

Wrist HR is often problematic for some with high exertion, or wrist flexing. Why arent you using the HRM paired to the watch and then broadcast that to Zwift? For me, 24x7 wrist HR is ok, but I really don't rated any wrist hr from any device for activity usage, when a hr strap is like £20

Thanks I agree, I always use the strap for training. What benefit is there to broadcast to Zwift via the watch as opposed to just connecting the strap directly to Zwift? I sync Zwift so it lands in my Fenix anyway as a workout. 

You'd avoid this sort of issue and it would help keep all your stats and training in sync, and not risk crappy data affecting recovery etc. That way you wouldn't have conflicting hr data for the period of time covering the activity - that could affect body battery, stress, recovery etc

why not just connect the HR strap to both at the same time? I believe, the wrist HR is more accurate when recording an activity rather than just sitting there in passive mode.

if you are interested in the Physio True Up stats, you need to record the activity on the watch anyway as importing from Zwift will not do it.

The Wrist HR seems to work well for DCRainmaker and a few other people, but not for me.  I've long since given up at getting anything remotely accurate if there's any movement involved.  Running, cycling, weight lifting, even walking it's way off on my wrist- no matter how tight the band, or where I position it.  I guess I've got a boney divot in my wrist and the sensor just doesn't make a good connection.  Or have very little blood flow in that location.  I wear a separate Optical HR monitor on my forearm that does a pretty good job.  

The wrist HR is more accurate recording an activity, than in 24/7 mode. If you peek under the watch, you will see the sensor go from strobing to solid On when you start an activity. In particular, I think strobing has problems consistently picking up HR over about 120 bpm.

in the last few weeks I've noticed that my indoor cycling HR are about half of what they had been previously as I'm expecting to see around 130-140 bpm spiking around 150 bpm but my Garmin Fenix 6 is showing 60-80 bpm. It was suggested elsewhere to just use the 'Cardio' activity and then edit it to the preferred activity afterwards which worked initially. However, now my 'Cardio' HR is reading at about double what I'm expecting to see  as an example, today I did a 30 minute indoor ride and took it fairly easy. I didn't feel like my HR got much above 100-120 and my Fenix pulled 180 bpm average. I track the weight training activity and it has remained consistent to what I'm expecting to see and what feels about right. 

I'm very frustrated at this because this is all a new problem that I was not experiencing before the last update. It would be one thing if these HR inaccuracies were consistent in their inconsistencies but they are actually inconsistent in how they are inconsistent.  

Ngabikedad said:

There has to be a way to make it not go into standby mode when we are on the trainer

Yes. Press Start to actually commence recording an activity. You can Discard rather than saving at the end to prevent duplicate activities if you want.